Study of the influence of dithizone as an eco-friendly corrosion inhibitor on the corrosion behaviour of AA7075 aluminium alloy in neutral chloride solution

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/METAL/2021002

M. Acila, H. Bensabra, M. Santamaría

引用次数: 2

Abstract

The effect of 1,5-diphenylthiocarbazone (dithizone) as an eco-friendly corrosion inhibitor for protection of AA7075 aluminium alloy in chloride containing aggressive environment was studied by means of weight-loss, electrochemical measurements and Raman spectroscopy. The results indicate that the addition of dithizone decreases significantly the corrosion rate of AA7075 alloy, with efficiency proportional to the inhibitor concentration. The polarization curves show that dithizone works as mixed-type inhibitor to slow down the anodic and cathodic reaction kinetic. The morphology revealed by scanning electron microscopy and the Raman spectroscopy analysis clearly shows that the inhibitor contributes in the formation of a stable protective film on the AA7075 alloy due to the adsorption of dithizone molecules on aluminium alloy surface obeying Langmuir adsorption isotherm.

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双硫腙作为环保型缓蚀剂对AA7075铝合金在中性氯溶液中腐蚀行为的影响研究

采用失重、电化学测量和拉曼光谱等方法研究了1,5-二苯基硫脲(dithizone)作为环保型缓蚀剂对含氯侵蚀环境中AA7075铝合金的保护作用。结果表明:双硫腙的加入显著降低了AA7075合金的腐蚀速率，且效果与缓蚀剂浓度成正比;极化曲线表明，双硫腙作为混合型缓蚀剂可减缓阳极和阴极反应动力学。扫描电镜和拉曼光谱的形貌分析表明，双硫腙分子在铝合金表面的吸附服从Langmuir吸附等温线，有助于在AA7075合金表面形成稳定的保护膜。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.